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Decoding apparatus for digital communications and method for using the same

  • US 8,850,294 B1
  • Filed: 04/09/2007
  • Issued: 09/30/2014
  • Est. Priority Date: 04/09/2007
  • Status: Expired due to Fees
First Claim
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1. A decoding apparatus comprising:

  • a hard-decision unit performing hard-decision on a soft-input of a code;

    a reliability determination unit generating a reliability estimation value of a result of the hard-decision,wherein the reliability estimation value depends on whether a packet error exists or does not exist in the hard-decision result,wherein the hard-decision unit performs hard-decision depending on the reliability estimation value,wherein the reliability determination unit generates the reliability estimation value, which changes depending on the hard-decision result, when the packet error does not exist in the hard-decision result, and the reliability determination unit generates a constant reliability estimation value when the packet error exists in the hard-decision result,wherein the reliability determination unit comprises a packet error detector for detecting the packet error, depending on the hard-decision result outputted from the hard-decision unit,wherein the reliability determination unit further comprises a reliability estimation value generator for generating the reliability estimation value of the hard-decision result, according to whether the packet error is detected, andwherein the reliability estimation value generator further comprises a multiplexer for selecting either the hard-decision result value or a predetermined constant value, depending on whether the packet error is detected.

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